I also run the "Q" pads on the street, they do seem to have slightly less braking torque than I would expect. When I was swapping pads alot I did notice that when replacing T's with E's without bedding the torque was much lower. A good bedding cycle fixed that.
D-CEL, are the D's discontinued? I tried to find them on Wilwoods site:
http://www.wilwood.com/BrakePads/003-DESC/index.asp